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Millions of sensitive Facebook user records were left exposed on public web, security researchers say

More than 540 million Facebook records — including users’ comments, likes, account names and more — were left exposed on an Amazon cloud-computing server, researchers announced, marking the latest major privacy and security mishap to plague the social-networking giant. The trove is one of two data sets discovered to be in full public view by the security firm UpGuard, which also raised alarms with a second app developer that appears to have mishandled Facebook records including users’ interests and potentially their app passwords. Facebook said its policies prohibit app developers from “storing information in a public database,” adding it has worked with Amazon to take them down.